<?php
if (! defined('BASEPATH')) {
	exit('Access Denied');
}
class Common {
	function Common(){
	}
/*
 *return table 前缀 
 * 
 */
function table_pre($group){
	$table_pre = '' ;
	if($group){
		$ci = &get_instance(); //初始化 为了用方法
		$d = $ci->load->database('real_data',true);
		$table_pre =  $d->table_pre;
	}
	return $table_pre ;
	
}	
}